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-rw-r--r--tools/testing/selftests/bpf/test_verifier.c442
1 files changed, 439 insertions, 3 deletions
diff --git a/tools/testing/selftests/bpf/test_verifier.c b/tools/testing/selftests/bpf/test_verifier.c
index 9bb45346dc72..1aa73241c999 100644
--- a/tools/testing/selftests/bpf/test_verifier.c
+++ b/tools/testing/selftests/bpf/test_verifier.c
@@ -859,15 +859,451 @@ static struct bpf_test tests[] = {
.result = REJECT,
},
{
- "check non-u32 access to cb",
+ "check cb access: byte",
.insns = {
- BPF_STX_MEM(BPF_H, BPF_REG_1, BPF_REG_1,
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_STX_MEM(BPF_B, BPF_REG_1, BPF_REG_0,
+ offsetof(struct __sk_buff, cb[0])),
+ BPF_STX_MEM(BPF_B, BPF_REG_1, BPF_REG_0,
+ offsetof(struct __sk_buff, cb[0]) + 1),
+ BPF_STX_MEM(BPF_B, BPF_REG_1, BPF_REG_0,
+ offsetof(struct __sk_buff, cb[0]) + 2),
+ BPF_STX_MEM(BPF_B, BPF_REG_1, BPF_REG_0,
+ offsetof(struct __sk_buff, cb[0]) + 3),
+ BPF_STX_MEM(BPF_B, BPF_REG_1, BPF_REG_0,
+ offsetof(struct __sk_buff, cb[1])),
+ BPF_STX_MEM(BPF_B, BPF_REG_1, BPF_REG_0,
+ offsetof(struct __sk_buff, cb[1]) + 1),
+ BPF_STX_MEM(BPF_B, BPF_REG_1, BPF_REG_0,
+ offsetof(struct __sk_buff, cb[1]) + 2),
+ BPF_STX_MEM(BPF_B, BPF_REG_1, BPF_REG_0,
+ offsetof(struct __sk_buff, cb[1]) + 3),
+ BPF_STX_MEM(BPF_B, BPF_REG_1, BPF_REG_0,
+ offsetof(struct __sk_buff, cb[2])),
+ BPF_STX_MEM(BPF_B, BPF_REG_1, BPF_REG_0,
+ offsetof(struct __sk_buff, cb[2]) + 1),
+ BPF_STX_MEM(BPF_B, BPF_REG_1, BPF_REG_0,
+ offsetof(struct __sk_buff, cb[2]) + 2),
+ BPF_STX_MEM(BPF_B, BPF_REG_1, BPF_REG_0,
+ offsetof(struct __sk_buff, cb[2]) + 3),
+ BPF_STX_MEM(BPF_B, BPF_REG_1, BPF_REG_0,
+ offsetof(struct __sk_buff, cb[3])),
+ BPF_STX_MEM(BPF_B, BPF_REG_1, BPF_REG_0,
+ offsetof(struct __sk_buff, cb[3]) + 1),
+ BPF_STX_MEM(BPF_B, BPF_REG_1, BPF_REG_0,
+ offsetof(struct __sk_buff, cb[3]) + 2),
+ BPF_STX_MEM(BPF_B, BPF_REG_1, BPF_REG_0,
+ offsetof(struct __sk_buff, cb[3]) + 3),
+ BPF_STX_MEM(BPF_B, BPF_REG_1, BPF_REG_0,
+ offsetof(struct __sk_buff, cb[4])),
+ BPF_STX_MEM(BPF_B, BPF_REG_1, BPF_REG_0,
+ offsetof(struct __sk_buff, cb[4]) + 1),
+ BPF_STX_MEM(BPF_B, BPF_REG_1, BPF_REG_0,
+ offsetof(struct __sk_buff, cb[4]) + 2),
+ BPF_STX_MEM(BPF_B, BPF_REG_1, BPF_REG_0,
+ offsetof(struct __sk_buff, cb[4]) + 3),
+ BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1,
+ offsetof(struct __sk_buff, cb[0])),
+ BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1,
+ offsetof(struct __sk_buff, cb[0]) + 1),
+ BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1,
+ offsetof(struct __sk_buff, cb[0]) + 2),
+ BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1,
+ offsetof(struct __sk_buff, cb[0]) + 3),
+ BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1,
+ offsetof(struct __sk_buff, cb[1])),
+ BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1,
+ offsetof(struct __sk_buff, cb[1]) + 1),
+ BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1,
+ offsetof(struct __sk_buff, cb[1]) + 2),
+ BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1,
+ offsetof(struct __sk_buff, cb[1]) + 3),
+ BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1,
+ offsetof(struct __sk_buff, cb[2])),
+ BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1,
+ offsetof(struct __sk_buff, cb[2]) + 1),
+ BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1,
+ offsetof(struct __sk_buff, cb[2]) + 2),
+ BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1,
+ offsetof(struct __sk_buff, cb[2]) + 3),
+ BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1,
+ offsetof(struct __sk_buff, cb[3])),
+ BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1,
+ offsetof(struct __sk_buff, cb[3]) + 1),
+ BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1,
+ offsetof(struct __sk_buff, cb[3]) + 2),
+ BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1,
+ offsetof(struct __sk_buff, cb[3]) + 3),
+ BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1,
+ offsetof(struct __sk_buff, cb[4])),
+ BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1,
+ offsetof(struct __sk_buff, cb[4]) + 1),
+ BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1,
+ offsetof(struct __sk_buff, cb[4]) + 2),
+ BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1,
+ offsetof(struct __sk_buff, cb[4]) + 3),
+ BPF_EXIT_INSN(),
+ },
+ .result = ACCEPT,
+ },
+ {
+ "check cb access: byte, oob 1",
+ .insns = {
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_STX_MEM(BPF_B, BPF_REG_1, BPF_REG_0,
+ offsetof(struct __sk_buff, cb[4]) + 4),
+ BPF_EXIT_INSN(),
+ },
+ .errstr = "invalid bpf_context access",
+ .result = REJECT,
+ },
+ {
+ "check cb access: byte, oob 2",
+ .insns = {
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_STX_MEM(BPF_B, BPF_REG_1, BPF_REG_0,
+ offsetof(struct __sk_buff, cb[0]) - 1),
+ BPF_EXIT_INSN(),
+ },
+ .errstr = "invalid bpf_context access",
+ .result = REJECT,
+ },
+ {
+ "check cb access: byte, oob 3",
+ .insns = {
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1,
+ offsetof(struct __sk_buff, cb[4]) + 4),
+ BPF_EXIT_INSN(),
+ },
+ .errstr = "invalid bpf_context access",
+ .result = REJECT,
+ },
+ {
+ "check cb access: byte, oob 4",
+ .insns = {
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_1,
+ offsetof(struct __sk_buff, cb[0]) - 1),
+ BPF_EXIT_INSN(),
+ },
+ .errstr = "invalid bpf_context access",
+ .result = REJECT,
+ },
+ {
+ "check cb access: byte, wrong type",
+ .insns = {
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_STX_MEM(BPF_B, BPF_REG_1, BPF_REG_0,
+ offsetof(struct __sk_buff, cb[0])),
+ BPF_EXIT_INSN(),
+ },
+ .errstr = "invalid bpf_context access",
+ .result = REJECT,
+ .prog_type = BPF_PROG_TYPE_CGROUP_SOCK,
+ },
+ {
+ "check cb access: half",
+ .insns = {
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_STX_MEM(BPF_H, BPF_REG_1, BPF_REG_0,
+ offsetof(struct __sk_buff, cb[0])),
+ BPF_STX_MEM(BPF_H, BPF_REG_1, BPF_REG_0,
+ offsetof(struct __sk_buff, cb[0]) + 2),
+ BPF_STX_MEM(BPF_H, BPF_REG_1, BPF_REG_0,
+ offsetof(struct __sk_buff, cb[1])),
+ BPF_STX_MEM(BPF_H, BPF_REG_1, BPF_REG_0,
+ offsetof(struct __sk_buff, cb[1]) + 2),
+ BPF_STX_MEM(BPF_H, BPF_REG_1, BPF_REG_0,
+ offsetof(struct __sk_buff, cb[2])),
+ BPF_STX_MEM(BPF_H, BPF_REG_1, BPF_REG_0,
+ offsetof(struct __sk_buff, cb[2]) + 2),
+ BPF_STX_MEM(BPF_H, BPF_REG_1, BPF_REG_0,
+ offsetof(struct __sk_buff, cb[3])),
+ BPF_STX_MEM(BPF_H, BPF_REG_1, BPF_REG_0,
+ offsetof(struct __sk_buff, cb[3]) + 2),
+ BPF_STX_MEM(BPF_H, BPF_REG_1, BPF_REG_0,
+ offsetof(struct __sk_buff, cb[4])),
+ BPF_STX_MEM(BPF_H, BPF_REG_1, BPF_REG_0,
+ offsetof(struct __sk_buff, cb[4]) + 2),
+ BPF_LDX_MEM(BPF_H, BPF_REG_0, BPF_REG_1,
+ offsetof(struct __sk_buff, cb[0])),
+ BPF_LDX_MEM(BPF_H, BPF_REG_0, BPF_REG_1,
+ offsetof(struct __sk_buff, cb[0]) + 2),
+ BPF_LDX_MEM(BPF_H, BPF_REG_0, BPF_REG_1,
+ offsetof(struct __sk_buff, cb[1])),
+ BPF_LDX_MEM(BPF_H, BPF_REG_0, BPF_REG_1,
+ offsetof(struct __sk_buff, cb[1]) + 2),
+ BPF_LDX_MEM(BPF_H, BPF_REG_0, BPF_REG_1,
+ offsetof(struct __sk_buff, cb[2])),
+ BPF_LDX_MEM(BPF_H, BPF_REG_0, BPF_REG_1,
+ offsetof(struct __sk_buff, cb[2]) + 2),
+ BPF_LDX_MEM(BPF_H, BPF_REG_0, BPF_REG_1,
+ offsetof(struct __sk_buff, cb[3])),
+ BPF_LDX_MEM(BPF_H, BPF_REG_0, BPF_REG_1,
+ offsetof(struct __sk_buff, cb[3]) + 2),
+ BPF_LDX_MEM(BPF_H, BPF_REG_0, BPF_REG_1,
+ offsetof(struct __sk_buff, cb[4])),
+ BPF_LDX_MEM(BPF_H, BPF_REG_0, BPF_REG_1,
+ offsetof(struct __sk_buff, cb[4]) + 2),
+ BPF_EXIT_INSN(),
+ },
+ .result = ACCEPT,
+ },
+ {
+ "check cb access: half, unaligned",
+ .insns = {
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_STX_MEM(BPF_H, BPF_REG_1, BPF_REG_0,
+ offsetof(struct __sk_buff, cb[0]) + 1),
+ BPF_EXIT_INSN(),
+ },
+ .errstr = "misaligned access",
+ .result = REJECT,
+ },
+ {
+ "check cb access: half, oob 1",
+ .insns = {
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_STX_MEM(BPF_H, BPF_REG_1, BPF_REG_0,
+ offsetof(struct __sk_buff, cb[4]) + 4),
+ BPF_EXIT_INSN(),
+ },
+ .errstr = "invalid bpf_context access",
+ .result = REJECT,
+ },
+ {
+ "check cb access: half, oob 2",
+ .insns = {
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_STX_MEM(BPF_H, BPF_REG_1, BPF_REG_0,
+ offsetof(struct __sk_buff, cb[0]) - 2),
+ BPF_EXIT_INSN(),
+ },
+ .errstr = "invalid bpf_context access",
+ .result = REJECT,
+ },
+ {
+ "check cb access: half, oob 3",
+ .insns = {
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_LDX_MEM(BPF_H, BPF_REG_0, BPF_REG_1,
+ offsetof(struct __sk_buff, cb[4]) + 4),
+ BPF_EXIT_INSN(),
+ },
+ .errstr = "invalid bpf_context access",
+ .result = REJECT,
+ },
+ {
+ "check cb access: half, oob 4",
+ .insns = {
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_LDX_MEM(BPF_H, BPF_REG_0, BPF_REG_1,
+ offsetof(struct __sk_buff, cb[0]) - 2),
+ BPF_EXIT_INSN(),
+ },
+ .errstr = "invalid bpf_context access",
+ .result = REJECT,
+ },
+ {
+ "check cb access: half, wrong type",
+ .insns = {
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_STX_MEM(BPF_H, BPF_REG_1, BPF_REG_0,
+ offsetof(struct __sk_buff, cb[0])),
+ BPF_EXIT_INSN(),
+ },
+ .errstr = "invalid bpf_context access",
+ .result = REJECT,
+ .prog_type = BPF_PROG_TYPE_CGROUP_SOCK,
+ },
+ {
+ "check cb access: word",
+ .insns = {
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_STX_MEM(BPF_W, BPF_REG_1, BPF_REG_0,
+ offsetof(struct __sk_buff, cb[0])),
+ BPF_STX_MEM(BPF_W, BPF_REG_1, BPF_REG_0,
+ offsetof(struct __sk_buff, cb[1])),
+ BPF_STX_MEM(BPF_W, BPF_REG_1, BPF_REG_0,
+ offsetof(struct __sk_buff, cb[2])),
+ BPF_STX_MEM(BPF_W, BPF_REG_1, BPF_REG_0,
+ offsetof(struct __sk_buff, cb[3])),
+ BPF_STX_MEM(BPF_W, BPF_REG_1, BPF_REG_0,
+ offsetof(struct __sk_buff, cb[4])),
+ BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_1,
+ offsetof(struct __sk_buff, cb[0])),
+ BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_1,
+ offsetof(struct __sk_buff, cb[1])),
+ BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_1,
+ offsetof(struct __sk_buff, cb[2])),
+ BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_1,
+ offsetof(struct __sk_buff, cb[3])),
+ BPF_LDX_MEM(BPF_W, BPF_REG_0, BPF_REG_1,
+ offsetof(struct __sk_buff, cb[4])),
+ BPF_EXIT_INSN(),
+ },
+ .result = ACCEPT,
+ },
+ {
+ "check cb access: word, unaligned 1",
+ .insns = {
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_STX_MEM(BPF_W, BPF_REG_1, BPF_REG_0,
+ offsetof(struct __sk_buff, cb[0]) + 2),
+ BPF_EXIT_INSN(),
+ },
+ .errstr = "misaligned access",
+ .result = REJECT,
+ },
+ {
+ "check cb access: word, unaligned 2",
+ .insns = {
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_STX_MEM(BPF_W, BPF_REG_1, BPF_REG_0,
+ offsetof(struct __sk_buff, cb[4]) + 1),
+ BPF_EXIT_INSN(),
+ },
+ .errstr = "misaligned access",
+ .result = REJECT,
+ },
+ {
+ "check cb access: word, unaligned 3",
+ .insns = {
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_STX_MEM(BPF_W, BPF_REG_1, BPF_REG_0,
+ offsetof(struct __sk_buff, cb[4]) + 2),
+ BPF_EXIT_INSN(),
+ },
+ .errstr = "misaligned access",
+ .result = REJECT,
+ },
+ {
+ "check cb access: word, unaligned 4",
+ .insns = {
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_STX_MEM(BPF_W, BPF_REG_1, BPF_REG_0,
+ offsetof(struct __sk_buff, cb[4]) + 3),
+ BPF_EXIT_INSN(),
+ },
+ .errstr = "misaligned access",
+ .result = REJECT,
+ },
+ {
+ "check cb access: double",
+ .insns = {
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_STX_MEM(BPF_DW, BPF_REG_1, BPF_REG_0,
+ offsetof(struct __sk_buff, cb[0])),
+ BPF_STX_MEM(BPF_DW, BPF_REG_1, BPF_REG_0,
+ offsetof(struct __sk_buff, cb[2])),
+ BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_1,
+ offsetof(struct __sk_buff, cb[0])),
+ BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_1,
+ offsetof(struct __sk_buff, cb[2])),
+ BPF_EXIT_INSN(),
+ },
+ .result = ACCEPT,
+ },
+ {
+ "check cb access: double, unaligned 1",
+ .insns = {
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_STX_MEM(BPF_DW, BPF_REG_1, BPF_REG_0,
+ offsetof(struct __sk_buff, cb[1])),
+ BPF_EXIT_INSN(),
+ },
+ .errstr = "misaligned access",
+ .result = REJECT,
+ },
+ {
+ "check cb access: double, unaligned 2",
+ .insns = {
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_STX_MEM(BPF_DW, BPF_REG_1, BPF_REG_0,
+ offsetof(struct __sk_buff, cb[3])),
+ BPF_EXIT_INSN(),
+ },
+ .errstr = "misaligned access",
+ .result = REJECT,
+ },
+ {
+ "check cb access: double, oob 1",
+ .insns = {
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_STX_MEM(BPF_DW, BPF_REG_1, BPF_REG_0,
+ offsetof(struct __sk_buff, cb[4])),
+ BPF_EXIT_INSN(),
+ },
+ .errstr = "invalid bpf_context access",
+ .result = REJECT,
+ },
+ {
+ "check cb access: double, oob 2",
+ .insns = {
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_STX_MEM(BPF_DW, BPF_REG_1, BPF_REG_0,
+ offsetof(struct __sk_buff, cb[4]) + 8),
+ BPF_EXIT_INSN(),
+ },
+ .errstr = "invalid bpf_context access",
+ .result = REJECT,
+ },
+ {
+ "check cb access: double, oob 3",
+ .insns = {
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_STX_MEM(BPF_DW, BPF_REG_1, BPF_REG_0,
+ offsetof(struct __sk_buff, cb[0]) - 8),
+ BPF_EXIT_INSN(),
+ },
+ .errstr = "invalid bpf_context access",
+ .result = REJECT,
+ },
+ {
+ "check cb access: double, oob 4",
+ .insns = {
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_1,
+ offsetof(struct __sk_buff, cb[4])),
+ BPF_EXIT_INSN(),
+ },
+ .errstr = "invalid bpf_context access",
+ .result = REJECT,
+ },
+ {
+ "check cb access: double, oob 5",
+ .insns = {
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_1,
+ offsetof(struct __sk_buff, cb[4]) + 8),
+ BPF_EXIT_INSN(),
+ },
+ .errstr = "invalid bpf_context access",
+ .result = REJECT,
+ },
+ {
+ "check cb access: double, oob 6",
+ .insns = {
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_1,
+ offsetof(struct __sk_buff, cb[0]) - 8),
+ BPF_EXIT_INSN(),
+ },
+ .errstr = "invalid bpf_context access",
+ .result = REJECT,
+ },
+ {
+ "check cb access: double, wrong type",
+ .insns = {
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_STX_MEM(BPF_DW, BPF_REG_1, BPF_REG_0,
offsetof(struct __sk_buff, cb[0])),
BPF_EXIT_INSN(),
},
.errstr = "invalid bpf_context access",
- .errstr_unpriv = "R1 leaks addr",
.result = REJECT,
+ .prog_type = BPF_PROG_TYPE_CGROUP_SOCK,
},
{
"check out of range skb->cb access",
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-04 16:25:10 +0000